bisecting fixing commit since f6e1ea19649216156576aeafa784e3b4cee45549
building syzkaller on 79264ae39c1ef4b4875ab67d6f0c8c3e75aa6a34
testing commit f6e1ea19649216156576aeafa784e3b4cee45549 with gcc (GCC) 10.2.1 20210217
kernel signature: 529e521a8abe6cda5acb9437ab2613fe3c36c29af154b461e8587b40881ed364
all runs: crashed: WARNING in ext4_xattr_set_entry
testing current HEAD 280d542f6ffac0e6d65dc267f92191d509b13b64
testing commit 280d542f6ffac0e6d65dc267f92191d509b13b64 with gcc (GCC) 10.2.1 20210217
kernel signature: 7fc2221069954bf2d7fc43baa0d5abf753136a11ab18a7d4aa9373ee8e794992
all runs: crashed: WARNING in ext4_xattr_set_entry
revisions tested: 2, total time: 19m1.714870932s (build: 11m39.980921654s, test: 6m39.373979186s)
the crash still happens on HEAD
commit msg: Merge tag 'drm-fixes-2021-03-05' of git://anongit.freedesktop.org/drm/drm
crash: WARNING in ext4_xattr_set_entry
------------[ cut here ]------------
WARNING: CPU: 1 PID: 10237 at fs/ext4/xattr.c:1643 ext4_xattr_set_entry+0x244a/0x3770 fs/ext4/xattr.c:1670
Modules linked in:
CPU: 1 PID: 10237 Comm: syz-executor.3 Not tainted 5.12.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ext4_xattr_set_entry+0x244a/0x3770 fs/ext4/xattr.c:1643
Code: ea ff ff 4c 89 df 41 89 c0 48 c7 c1 60 03 9f 88 ba 86 06 00 00 48 c7 c6 00 0b 9f 88 e8 ef 72 fe ff 4c 8b 1c 24 e9 9a fb ff ff <0f> 0b e9 59 ea ff ff 48 8b 54 24 38 31 f6 4c 89 f7 e8 20 ed a9 ff
RSP: 0018:ffffc9000ae773f0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffc9000ae77730 RCX: 0000000000000000
RDX: 1ffff920015cef0d RSI: 00000000000003fc RDI: 0000000000000001
RBP: ffffc9000ae77858 R08: 0000000000000000 R09: 00000000ffffffc3
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88803a916820
R13: 0000000000000000 R14: ffff88803a916820 R15: ffff88803a916820
FS:  00007f0a07418700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000970004 CR3: 00000000112dc000 CR4: 0000000000350ef0
Call Trace:
 ext4_xattr_block_set+0x739/0x28c0 fs/ext4/xattr.c:1944
 ext4_xattr_set_handle+0x9fc/0x1080 fs/ext4/xattr.c:2392
 ext4_xattr_set+0x11d/0x2c0 fs/ext4/xattr.c:2493
 __vfs_setxattr+0xdb/0x130 fs/xattr.c:180
 __vfs_setxattr_noperm+0xee/0x480 fs/xattr.c:214
 vfs_setxattr+0x111/0x2d0 fs/xattr.c:300
 setxattr+0x157/0x260 fs/xattr.c:573
 path_setxattr+0x13c/0x170 fs/xattr.c:593
 __do_sys_lsetxattr fs/xattr.c:616 [inline]
 __se_sys_lsetxattr fs/xattr.c:612 [inline]
 __x64_sys_lsetxattr+0xb8/0x150 fs/xattr.c:612
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465b09
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0a07418188 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000020000140
RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffe57ba345f R14: 00007f0a07418300 R15: 0000000000022000