* Forwarded: #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f14faaf3a1fb3b9e4cf2e56269711fb85fba9458
2026-02-04 0:52 [syzbot] [f2fs?] kernel BUG in clear_inode (5) syzbot
@ 2026-02-05 11:55 ` syzbot
2026-02-24 14:44 ` Forwarded: Re: [syzbot] [f2fs?] kernel BUG in clear_inode (5) syzbot
` (4 subsequent siblings)
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From: syzbot @ 2026-02-05 11:55 UTC (permalink / raw)
To: linux-kernel, syzkaller-bugs
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Subject: #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f14faaf3a1fb3b9e4cf2e56269711fb85fba9458
Author: dmantipov@yandex.ru
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f14faaf3a1fb3b9e4cf2e56269711fb85fba9458
^ permalink raw reply [flat|nested] 7+ messages in thread* Forwarded: Re: [syzbot] [f2fs?] kernel BUG in clear_inode (5)
2026-02-04 0:52 [syzbot] [f2fs?] kernel BUG in clear_inode (5) syzbot
2026-02-05 11:55 ` Forwarded: #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f14faaf3a1fb3b9e4cf2e56269711fb85fba9458 syzbot
@ 2026-02-24 14:44 ` syzbot
2026-02-24 14:52 ` syzbot
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: syzbot @ 2026-02-24 14:44 UTC (permalink / raw)
To: linux-kernel, syzkaller-bugs
For archival purposes, forwarding an incoming command email to
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***
Subject: Re: [syzbot] [f2fs?] kernel BUG in clear_inode (5)
Author: kth5965@gmail.com
#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 38b8994bc1b2..914a0966a1c5 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -1001,6 +1001,13 @@ void f2fs_evict_inode(struct inode *inode)
out_clear:
fscrypt_put_encryption_info(inode);
fsverity_cleanup_inode(inode);
+ /*
+ * Pages in inode's data mapping may have been re-added during
+ * eviction, e.g. by f2fs_convert_inline_inode() called from
+ * f2fs_truncate(). Truncate them again before clear_inode()
+ * which expects nrpages == 0.
+ */
+ truncate_inode_pages_final(&inode->i_data);
clear_inode(inode);
}
^ permalink raw reply [flat|nested] 7+ messages in thread* Forwarded: Re: [syzbot] [f2fs?] kernel BUG in clear_inode (5)
2026-02-04 0:52 [syzbot] [f2fs?] kernel BUG in clear_inode (5) syzbot
2026-02-05 11:55 ` Forwarded: #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f14faaf3a1fb3b9e4cf2e56269711fb85fba9458 syzbot
2026-02-24 14:44 ` Forwarded: Re: [syzbot] [f2fs?] kernel BUG in clear_inode (5) syzbot
@ 2026-02-24 14:52 ` syzbot
2026-03-28 15:41 ` Forwarded: Re: [syzbot] [f2fs?] kernel BUG in clear_inode syzbot
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: syzbot @ 2026-02-24 14:52 UTC (permalink / raw)
To: linux-kernel, syzkaller-bugs
For archival purposes, forwarding an incoming command email to
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***
Subject: Re: [syzbot] [f2fs?] kernel BUG in clear_inode (5)
Author: kth5965@gmail.com
#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -1007,6 +1007,13 @@ void f2fs_evict_inode(struct inode *inode)
out_clear:
fscrypt_put_encryption_info(inode);
+ /*
+ * Pages in inode's data mapping may have been re-added during
+ * eviction, e.g. by f2fs_convert_inline_inode() called from
+ * f2fs_truncate(). Truncate them again before clear_inode()
+ * which expects nrpages == 0.
+ */
+ truncate_inode_pages_final(&inode->i_data);
clear_inode(inode);
}
^ permalink raw reply [flat|nested] 7+ messages in thread* Forwarded: Re: [syzbot] [f2fs?] kernel BUG in clear_inode
2026-02-04 0:52 [syzbot] [f2fs?] kernel BUG in clear_inode (5) syzbot
` (2 preceding siblings ...)
2026-02-24 14:52 ` syzbot
@ 2026-03-28 15:41 ` syzbot
2026-03-28 15:47 ` syzbot
2026-03-28 16:17 ` syzbot
5 siblings, 0 replies; 7+ messages in thread
From: syzbot @ 2026-03-28 15:41 UTC (permalink / raw)
To: linux-kernel, syzkaller-bugs
For archival purposes, forwarding an incoming command email to
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com.
***
Subject: Re: [syzbot] [f2fs?] kernel BUG in clear_inode
Author: kth5965@gmail.com
#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 0a1052d5ee62..92fcadf6d2cc 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -53,8 +53,8 @@ bool f2fs_sanity_check_inline_data(struct inode *inode, struct folio *ifolio)
if (!f2fs_has_inline_data(inode))
return false;
- if (inode_has_blocks(inode, ifolio))
- return false;
+ if (!f2fs_exist_data(inode) && inode_has_blocks(inode, ifolio))
+ return true;
if (!support_inline_data(inode))
return true;
@@ -142,6 +142,17 @@ int f2fs_read_inline_data(struct inode *inode, struct folio *folio)
return 0;
}
+static void f2fs_clear_inline_inode(struct dnode_of_data *dn)
+{
+ f2fs_folio_wait_writeback(dn->inode_folio, NODE, true, true);
+ clear_inode_flag(dn->inode, FI_DATA_EXIST);
+ clear_inode_flag(dn->inode, FI_INLINE_DATA);
+ set_raw_inline(dn->inode, F2FS_INODE(dn->inode_folio));
+ folio_mark_dirty(dn->inode_folio);
+ folio_clear_f2fs_inline(dn->inode_folio);
+ stat_dec_inline_inode(dn->inode);
+}
+
int f2fs_convert_inline_folio(struct dnode_of_data *dn, struct folio *folio)
{
struct f2fs_io_info fio = {
@@ -157,8 +168,10 @@ int f2fs_convert_inline_folio(struct dnode_of_data *dn, struct folio *folio)
struct node_info ni;
int dirty, err;
- if (!f2fs_exist_data(dn->inode))
- goto clear_out;
+ if (!f2fs_exist_data(dn->inode)) {
+ f2fs_clear_inline_inode(dn);
+ goto out;
+ }
err = f2fs_reserve_block(dn, 0);
if (err)
@@ -206,10 +219,8 @@ int f2fs_convert_inline_folio(struct dnode_of_data *dn, struct folio *folio)
/* clear inline data and flag after data writeback */
f2fs_truncate_inline_inode(dn->inode, dn->inode_folio, 0);
- folio_clear_f2fs_inline(dn->inode_folio);
-clear_out:
- stat_dec_inline_inode(dn->inode);
- clear_inode_flag(dn->inode, FI_INLINE_DATA);
+ f2fs_clear_inline_inode(dn);
+out:
f2fs_put_dnode(dn);
return 0;
}
@@ -232,9 +243,7 @@ int f2fs_convert_inline_inode(struct inode *inode)
if (err)
return err;
- folio = f2fs_grab_cache_folio(inode->i_mapping, 0, false);
- if (IS_ERR(folio))
- return PTR_ERR(folio);
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
f2fs_lock_op(sbi, &lc);
@@ -246,14 +255,23 @@ int f2fs_convert_inline_inode(struct inode *inode)
set_new_dnode(&dn, inode, ifolio, ifolio, 0);
+ if (f2fs_has_inline_data(inode) && f2fs_exist_data(inode)) {
+ folio = f2fs_grab_cache_folio(inode->i_mapping, 0, false);
+ if (IS_ERR(folio)) {
+ err = PTR_ERR(folio);
+ folio = NULL;
+ goto out;
+ }
+ }
+
if (f2fs_has_inline_data(inode))
err = f2fs_convert_inline_folio(&dn, folio);
- f2fs_put_dnode(&dn);
out:
+ f2fs_put_dnode(&dn);
f2fs_unlock_op(sbi, &lc);
-
- f2fs_folio_put(folio, true);
+ if (folio)
+ f2fs_folio_put(folio, true);
if (!err)
f2fs_balance_fs(sbi, dn.node_changed);
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index e7942e6e312c..e0f850b3f0c3 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -1006,13 +1006,6 @@ void f2fs_evict_inode(struct inode *inode)
}
out_clear:
fscrypt_put_encryption_info(inode);
- /*
- * Defensively truncate any remaining page cache, e.g.
- * f2fs_convert_inline_inode() called from f2fs_truncate()
- * may leave page #0 behind in the page cache when the
- * inline conversion takes the clear_out success path.
- */
- truncate_inode_pages_final(&inode->i_data);
clear_inode(inode);
}
^ permalink raw reply [flat|nested] 7+ messages in thread* Forwarded: Re: [syzbot] [f2fs?] kernel BUG in clear_inode
2026-02-04 0:52 [syzbot] [f2fs?] kernel BUG in clear_inode (5) syzbot
` (3 preceding siblings ...)
2026-03-28 15:41 ` Forwarded: Re: [syzbot] [f2fs?] kernel BUG in clear_inode syzbot
@ 2026-03-28 15:47 ` syzbot
2026-03-28 16:17 ` syzbot
5 siblings, 0 replies; 7+ messages in thread
From: syzbot @ 2026-03-28 15:47 UTC (permalink / raw)
To: linux-kernel, syzkaller-bugs
For archival purposes, forwarding an incoming command email to
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com.
***
Subject: Re: [syzbot] [f2fs?] kernel BUG in clear_inode
Author: kth5965@gmail.com
#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
Corrected patch: this resend excludes the local-only inode.c hunk and tests only the upstream-applicable inline.c fix.
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 0a1052d5ee62..92fcadf6d2cc 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -53,8 +53,8 @@ bool f2fs_sanity_check_inline_data(struct inode *inode, struct folio *ifolio)
if (!f2fs_has_inline_data(inode))
return false;
- if (inode_has_blocks(inode, ifolio))
- return false;
+ if (!f2fs_exist_data(inode) && inode_has_blocks(inode, ifolio))
+ return true;
if (!support_inline_data(inode))
return true;
@@ -142,6 +142,17 @@ int f2fs_read_inline_data(struct inode *inode, struct folio *folio)
return 0;
}
+static void f2fs_clear_inline_inode(struct dnode_of_data *dn)
+{
+ f2fs_folio_wait_writeback(dn->inode_folio, NODE, true, true);
+ clear_inode_flag(dn->inode, FI_DATA_EXIST);
+ clear_inode_flag(dn->inode, FI_INLINE_DATA);
+ set_raw_inline(dn->inode, F2FS_INODE(dn->inode_folio));
+ folio_mark_dirty(dn->inode_folio);
+ folio_clear_f2fs_inline(dn->inode_folio);
+ stat_dec_inline_inode(dn->inode);
+}
+
int f2fs_convert_inline_folio(struct dnode_of_data *dn, struct folio *folio)
{
struct f2fs_io_info fio = {
@@ -157,8 +168,10 @@ int f2fs_convert_inline_folio(struct dnode_of_data *dn, struct folio *folio)
struct node_info ni;
int dirty, err;
- if (!f2fs_exist_data(dn->inode))
- goto clear_out;
+ if (!f2fs_exist_data(dn->inode)) {
+ f2fs_clear_inline_inode(dn);
+ goto out;
+ }
err = f2fs_reserve_block(dn, 0);
if (err)
@@ -206,10 +219,8 @@ int f2fs_convert_inline_folio(struct dnode_of_data *dn, struct folio *folio)
/* clear inline data and flag after data writeback */
f2fs_truncate_inline_inode(dn->inode, dn->inode_folio, 0);
- folio_clear_f2fs_inline(dn->inode_folio);
-clear_out:
- stat_dec_inline_inode(dn->inode);
- clear_inode_flag(dn->inode, FI_INLINE_DATA);
+ f2fs_clear_inline_inode(dn);
+out:
f2fs_put_dnode(dn);
return 0;
}
@@ -232,9 +243,7 @@ int f2fs_convert_inline_inode(struct inode *inode)
if (err)
return err;
- folio = f2fs_grab_cache_folio(inode->i_mapping, 0, false);
- if (IS_ERR(folio))
- return PTR_ERR(folio);
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
f2fs_lock_op(sbi, &lc);
@@ -246,14 +255,23 @@ int f2fs_convert_inline_inode(struct inode *inode)
set_new_dnode(&dn, inode, ifolio, ifolio, 0);
+ if (f2fs_has_inline_data(inode) && f2fs_exist_data(inode)) {
+ folio = f2fs_grab_cache_folio(inode->i_mapping, 0, false);
+ if (IS_ERR(folio)) {
+ err = PTR_ERR(folio);
+ folio = NULL;
+ goto out;
+ }
+ }
+
if (f2fs_has_inline_data(inode))
err = f2fs_convert_inline_folio(&dn, folio);
- f2fs_put_dnode(&dn);
out:
+ f2fs_put_dnode(&dn);
f2fs_unlock_op(sbi, &lc);
-
- f2fs_folio_put(folio, true);
+ if (folio)
+ f2fs_folio_put(folio, true);
if (!err)
f2fs_balance_fs(sbi, dn.node_changed);
^ permalink raw reply [flat|nested] 7+ messages in thread* Forwarded: Re: [syzbot] [f2fs?] kernel BUG in clear_inode
2026-02-04 0:52 [syzbot] [f2fs?] kernel BUG in clear_inode (5) syzbot
` (4 preceding siblings ...)
2026-03-28 15:47 ` syzbot
@ 2026-03-28 16:17 ` syzbot
5 siblings, 0 replies; 7+ messages in thread
From: syzbot @ 2026-03-28 16:17 UTC (permalink / raw)
To: linux-kernel, syzkaller-bugs
For archival purposes, forwarding an incoming command email to
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com.
***
Subject: Re: [syzbot] [f2fs?] kernel BUG in clear_inode
Author: kth5965@gmail.com
#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 0a1052d5ee62..92fcadf6d2cc 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -53,8 +53,8 @@ bool f2fs_sanity_check_inline_data(struct inode *inode, struct folio *ifolio)
if (!f2fs_has_inline_data(inode))
return false;
- if (inode_has_blocks(inode, ifolio))
- return false;
+ if (!f2fs_exist_data(inode) && inode_has_blocks(inode, ifolio))
+ return true;
if (!support_inline_data(inode))
return true;
@@ -142,6 +142,17 @@ int f2fs_read_inline_data(struct inode *inode, struct folio *folio)
return 0;
}
+static void f2fs_clear_inline_inode(struct dnode_of_data *dn)
+{
+ f2fs_folio_wait_writeback(dn->inode_folio, NODE, true, true);
+ clear_inode_flag(dn->inode, FI_DATA_EXIST);
+ clear_inode_flag(dn->inode, FI_INLINE_DATA);
+ set_raw_inline(dn->inode, F2FS_INODE(dn->inode_folio));
+ folio_mark_dirty(dn->inode_folio);
+ folio_clear_f2fs_inline(dn->inode_folio);
+ stat_dec_inline_inode(dn->inode);
+}
+
int f2fs_convert_inline_folio(struct dnode_of_data *dn, struct folio *folio)
{
struct f2fs_io_info fio = {
@@ -157,8 +168,10 @@ int f2fs_convert_inline_folio(struct dnode_of_data *dn, struct folio *folio)
struct node_info ni;
int dirty, err;
- if (!f2fs_exist_data(dn->inode))
- goto clear_out;
+ if (!f2fs_exist_data(dn->inode)) {
+ f2fs_clear_inline_inode(dn);
+ goto out;
+ }
err = f2fs_reserve_block(dn, 0);
if (err)
@@ -206,10 +219,8 @@ int f2fs_convert_inline_folio(struct dnode_of_data *dn, struct folio *folio)
/* clear inline data and flag after data writeback */
f2fs_truncate_inline_inode(dn->inode, dn->inode_folio, 0);
- folio_clear_f2fs_inline(dn->inode_folio);
-clear_out:
- stat_dec_inline_inode(dn->inode);
- clear_inode_flag(dn->inode, FI_INLINE_DATA);
+ f2fs_clear_inline_inode(dn);
+out:
f2fs_put_dnode(dn);
return 0;
}
@@ -232,9 +243,7 @@ int f2fs_convert_inline_inode(struct inode *inode)
if (err)
return err;
- folio = f2fs_grab_cache_folio(inode->i_mapping, 0, false);
- if (IS_ERR(folio))
- return PTR_ERR(folio);
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
f2fs_lock_op(sbi, &lc);
@@ -246,14 +255,23 @@ int f2fs_convert_inline_inode(struct inode *inode)
set_new_dnode(&dn, inode, ifolio, ifolio, 0);
+ if (f2fs_has_inline_data(inode) && f2fs_exist_data(inode)) {
+ folio = f2fs_grab_cache_folio(inode->i_mapping, 0, false);
+ if (IS_ERR(folio)) {
+ err = PTR_ERR(folio);
+ folio = NULL;
+ goto out;
+ }
+ }
+
if (f2fs_has_inline_data(inode))
err = f2fs_convert_inline_folio(&dn, folio);
- f2fs_put_dnode(&dn);
out:
+ f2fs_put_dnode(&dn);
f2fs_unlock_op(sbi, &lc);
-
- f2fs_folio_put(folio, true);
+ if (folio)
+ f2fs_folio_put(folio, true);
if (!err)
f2fs_balance_fs(sbi, dn.node_changed);
^ permalink raw reply [flat|nested] 7+ messages in thread